Hi Cyrus, Thank you for the response. It seems like the below format is not throwing exception. However, the custom attribute is only the senders iCal object. Attendees/Recepients of an event is not delivered with the custom attribute. So, is there a way for me to send a custom attribute to the participants in an event? BEGIN:VCALENDAR PRODID:"-//Example//NONSGML HandCal//EN VERSION:2.0 CALSCALE:GREGORIAN BEGIN:VEVENT DTSTAMP:20151110T230335Z TZID:America/Los_Angeles UID:980e9fbf-d8a9-4264-adfd-5c2ff940d9df ORGANIZER;ROLE=CHAIR:urn:x-uid:gauravj SUMMARY:Testing Custom Attribute *X-CUSTOM-TEST:CUSTOM_TEST* CREATED:20151110T230335Z DTSTART:20151113T000000Z DTEND:20151113T010000Z ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=TRUE;CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED:urn:x-uid:gauravj END:VEVENT END:VCALENDAR On Tue, Nov 10, 2015 at 1:38 PM, Cyrus Daboo <cdaboo@apple.com> wrote:

Hi Gaurav,

--On November 10, 2015 at 1:36:20 PM -0800 Gaurav Jain < monkeyfdude@gmail.com> wrote:

...

Is it possible to send custom attributes with Calendar data with DCS 6.0?

I tried using X-CUSTOM-TEST but server throws error of invalid format.

Please provide an example of a full iCalendar object that contains the custom item so we can see if it is right.

-- Cyrus Daboo